/**
 * @ignore
 * some key-codes definition and utils from closure-library
 * @author yiminghe@gmail.com
 */
KISSY.add('event/dom/base/key-codes', function (S) {
    /**
     * @enum {Number} KISSY.Event.KeyCode
     * All key codes.
     */
    var UA = S.UA,
        KeyCode = {
            /**
             * MAC_ENTER
             */
            MAC_ENTER: 3,
            /**
             * BACKSPACE
             */
            BACKSPACE: 8,
            /**
             * TAB
             */
            TAB: 9,
            /**
             * NUMLOCK on FF/Safari Mac
             */
            NUM_CENTER: 12, // NUMLOCK on FF/Safari Mac
            /**
             * ENTER
             */
            ENTER: 13,
            /**
             * SHIFT
             */
            SHIFT: 16,
            /**
             * CTRL
             */
            CTRL: 17,
            /**
             * ALT
             */
            ALT: 18,
            /**
             * PAUSE
             */
            PAUSE: 19,
            /**
             * CAPS_LOCK
             */
            CAPS_LOCK: 20,
            /**
             * ESC
             */
            ESC: 27,
            /**
             * SPACE
             */
            SPACE: 32,
            /**
             * PAGE_UP
             */
            PAGE_UP: 33, // also NUM_NORTH_EAST
            /**
             * PAGE_DOWN
             */
            PAGE_DOWN: 34, // also NUM_SOUTH_EAST
            /**
             * END
             */
            END: 35, // also NUM_SOUTH_WEST
            /**
             * HOME
             */
            HOME: 36, // also NUM_NORTH_WEST
            /**
             * LEFT
             */
            LEFT: 37, // also NUM_WEST
            /**
             * UP
             */
            UP: 38, // also NUM_NORTH
            /**
             * RIGHT
             */
            RIGHT: 39, // also NUM_EAST
            /**
             * DOWN
             */
            DOWN: 40, // also NUM_SOUTH
            /**
             * PRINT_SCREEN
             */
            PRINT_SCREEN: 44,
            /**
             * INSERT
             */
            INSERT: 45, // also NUM_INSERT
            /**
             * DELETE
             */
            DELETE: 46, // also NUM_DELETE
            /**
             * ZERO
             */
            ZERO: 48,
            /**
             * ONE
             */
            ONE: 49,
            /**
             * TWO
             */
            TWO: 50,
            /**
             * THREE
             */
            THREE: 51,
            /**
             * FOUR
             */
            FOUR: 52,
            /**
             * FIVE
             */
            FIVE: 53,
            /**
             * SIX
             */
            SIX: 54,
            /**
             * SEVEN
             */
            SEVEN: 55,
            /**
             * EIGHT
             */
            EIGHT: 56,
            /**
             * NINE
             */
            NINE: 57,
            /**
             * QUESTION_MARK
             */
            QUESTION_MARK: 63, // needs localization
            /**
             * A
             */
            A: 65,
            /**
             * B
             */
            B: 66,
            /**
             * C
             */
            C: 67,
            /**
             * D
             */
            D: 68,
            /**
             * E
             */
            E: 69,
            /**
             * F
             */
            F: 70,
            /**
             * G
             */
            G: 71,
            /**
             * H
             */
            H: 72,
            /**
             * I
             */
            I: 73,
            /**
             * J
             */
            J: 74,
            /**
             * K
             */
            K: 75,
            /**
             * L
             */
            L: 76,
            /**
             * M
             */
            M: 77,
            /**
             * N
             */
            N: 78,
            /**
             * O
             */
            O: 79,
            /**
             * P
             */
            P: 80,
            /**
             * Q
             */
            Q: 81,
            /**
             * R
             */
            R: 82,
            /**
             * S
             */
            S: 83,
            /**
             * T
             */
            T: 84,
            /**
             * U
             */
            U: 85,
            /**
             * V
             */
            V: 86,
            /**
             * W
             */
            W: 87,
            /**
             * X
             */
            X: 88,
            /**
             * Y
             */
            Y: 89,
            /**
             * Z
             */
            Z: 90,
            /**
             * META
             */
            META: 91, // WIN_KEY_LEFT
            /**
             * WIN_KEY_RIGHT
             */
            WIN_KEY_RIGHT: 92,
            /**
             * CONTEXT_MENU
             */
            CONTEXT_MENU: 93,
            /**
             * NUM_ZERO
             */
            NUM_ZERO: 96,
            /**
             * NUM_ONE
             */
            NUM_ONE: 97,
            /**
             * NUM_TWO
             */
            NUM_TWO: 98,
            /**
             * NUM_THREE
             */
            NUM_THREE: 99,
            /**
             * NUM_FOUR
             */
            NUM_FOUR: 100,
            /**
             * NUM_FIVE
             */
            NUM_FIVE: 101,
            /**
             * NUM_SIX
             */
            NUM_SIX: 102,
            /**
             * NUM_SEVEN
             */
            NUM_SEVEN: 103,
            /**
             * NUM_EIGHT
             */
            NUM_EIGHT: 104,
            /**
             * NUM_NINE
             */
            NUM_NINE: 105,
            /**
             * NUM_MULTIPLY
             */
            NUM_MULTIPLY: 106,
            /**
             * NUM_PLUS
             */
            NUM_PLUS: 107,
            /**
             * NUM_MINUS
             */
            NUM_MINUS: 109,
            /**
             * NUM_PERIOD
             */
            NUM_PERIOD: 110,
            /**
             * NUM_DIVISION
             */
            NUM_DIVISION: 111,
            /**
             * F1
             */
            F1: 112,
            /**
             * F2
             */
            F2: 113,
            /**
             * F3
             */
            F3: 114,
            /**
             * F4
             */
            F4: 115,
            /**
             * F5
             */
            F5: 116,
            /**
             * F6
             */
            F6: 117,
            /**
             * F7
             */
            F7: 118,
            /**
             * F8
             */
            F8: 119,
            /**
             * F9
             */
            F9: 120,
            /**
             * F10
             */
            F10: 121,
            /**
             * F11
             */
            F11: 122,
            /**
             * F12
             */
            F12: 123,
            /**
             * NUMLOCK
             */
            NUMLOCK: 144,
            /**
             * SEMICOLON
             */
            SEMICOLON: 186, // needs localization
            /**
             * DASH
             */
            DASH: 189, // needs localization
            /**
             * EQUALS
             */
            EQUALS: 187, // needs localization
            /**
             * COMMA
             */
            COMMA: 188, // needs localization
            /**
             * PERIOD
             */
            PERIOD: 190, // needs localization
            /**
             * SLASH
             */
            SLASH: 191, // needs localization
            /**
             * APOSTROPHE
             */
            APOSTROPHE: 192, // needs localization
            /**
             * SINGLE_QUOTE
             */
            SINGLE_QUOTE: 222, // needs localization
            /**
             * OPEN_SQUARE_BRACKET
             */
            OPEN_SQUARE_BRACKET: 219, // needs localization
            /**
             * BACKSLASH
             */
            BACKSLASH: 220, // needs localization
            /**
             * CLOSE_SQUARE_BRACKET
             */
            CLOSE_SQUARE_BRACKET: 221, // needs localization
            /**
             * WIN_KEY
             */
            WIN_KEY: 224,
            /**
             * MAC_FF_META
             */
            MAC_FF_META: 224, // Firefox (Gecko) fires this for the meta key instead of 91
            /**
             * WIN_IME
             */
            WIN_IME: 229
        };

    /**
     * whether text and modified key is entered at the same time.
     * @param {KISSY.Event.DomEventObject} e event object
     * @return {Boolean}
     */
    KeyCode.isTextModifyingKeyEvent = function (e) {
        if (e.altKey && !e.ctrlKey ||
            e.metaKey ||
            // Function keys don't generate text
            e.keyCode >= KeyCode.F1 &&
                e.keyCode <= KeyCode.F12) {
            return false;
        }

        // The following keys are quite harmless, even in combination with
        // CTRL, ALT or SHIFT.
        switch (e.keyCode) {
            case KeyCode.ALT:
            case KeyCode.CAPS_LOCK:
            case KeyCode.CONTEXT_MENU:
            case KeyCode.CTRL:
            case KeyCode.DOWN:
            case KeyCode.END:
            case KeyCode.ESC:
            case KeyCode.HOME:
            case KeyCode.INSERT:
            case KeyCode.LEFT:
            case KeyCode.MAC_FF_META:
            case KeyCode.META:
            case KeyCode.NUMLOCK:
            case KeyCode.NUM_CENTER:
            case KeyCode.PAGE_DOWN:
            case KeyCode.PAGE_UP:
            case KeyCode.PAUSE:
            case KeyCode.PRINT_SCREEN:
            case KeyCode.RIGHT:
            case KeyCode.SHIFT:
            case KeyCode.UP:
            case KeyCode.WIN_KEY:
            case KeyCode.WIN_KEY_RIGHT:
                return false;
            default:
                return true;
        }
    };

    /**
     * whether character is entered.
     * @param {KISSY.Event.KeyCode} keyCode
     * @return {Boolean}
     */
    KeyCode.isCharacterKey = function (keyCode) {
        if (keyCode >= KeyCode.ZERO &&
            keyCode <= KeyCode.NINE) {
            return true;
        }

        if (keyCode >= KeyCode.NUM_ZERO &&
            keyCode <= KeyCode.NUM_MULTIPLY) {
            return true;
        }

        if (keyCode >= KeyCode.A &&
            keyCode <= KeyCode.Z) {
            return true;
        }

        // Safari sends zero key code for non-latin characters.
        if (UA.webkit && keyCode == 0) {
            return true;
        }

        switch (keyCode) {
            case KeyCode.SPACE:
            case KeyCode.QUESTION_MARK:
            case KeyCode.NUM_PLUS:
            case KeyCode.NUM_MINUS:
            case KeyCode.NUM_PERIOD:
            case KeyCode.NUM_DIVISION:
            case KeyCode.SEMICOLON:
            case KeyCode.DASH:
            case KeyCode.EQUALS:
            case KeyCode.COMMA:
            case KeyCode.PERIOD:
            case KeyCode.SLASH:
            case KeyCode.APOSTROPHE:
            case KeyCode.SINGLE_QUOTE:
            case KeyCode.OPEN_SQUARE_BRACKET:
            case KeyCode.BACKSLASH:
            case KeyCode.CLOSE_SQUARE_BRACKET:
                return true;
            default:
                return false;
        }
    };

    return KeyCode;

});